1 So forth they fared, but he behind them stayed, 2 Maugre his host, who grudged grievously
Maugre > in spite of, notwithstanding grudged > grumbled
3 To house a guest that would be needs obeyed,
needs > of necessity
4 And of his own him left not liberty:
his own > [his own household] liberty > [the liberty]
5 Might wanting measure moves surquidry.
Might wanting measure moves surquidry > Power lacking restraint leads to arrogance (measure = temperance, moderation; surquidry = arrogance, presumption)
6 Two things he feared, but the third was death; 7 That fierce young man's unruly mastery;
young man > (A compound sb., like "old man" (108.30:2, etc.) or "old woman" (302.47:4))